We started up our strenuous wifi testing again, with this morning's wireless-testing
(plus some of our own non-wifi-related patches).
We have a reproducible kernel hang when attempting to quickly
create and configure 64 STA interfaces, no encryption, with
an ath5k NIC.
It appears to me that this may be a general mac80211 deadlock
from the 'sysrq d' output below.
We'll attempt to reproduce with a lesser-patched wireless-testing
in the meantime.
Nov 10 14:54:33 localhost kernel: SysRq : Show Locks Held
Nov 10 14:54:33 localhost kernel:
Nov 10 14:54:33 localhost kernel: Showing all locks held in the system:
Nov 10 14:54:33 localhost kernel: 3 locks held by kworker/0:0/4:
Nov 10 14:54:33 localhost kernel: #0: (events){+.+.+.}, at: [<c0446ded>] process_one_work+0x13e/0x2bf
Nov 10 14:54:33 localhost kernel: #1: ((linkwatch_work).work){+.+.+.}, at: [<c0446ded>] process_one_work+0x13e/0x2bf
Nov 10 14:54:33 localhost kernel: #2: (rtnl_mutex){+.+.+.}, at: [<c070220f>] rtnl_lock+0xf/0x11
Nov 10 14:54:33 localhost kernel: 1 lock held by ntpd/1675:
Nov 10 14:54:33 localhost kernel: #0: (rtnl_mutex){+.+.+.}, at: [<c070220f>] rtnl_lock+0xf/0x11
Nov 10 14:54:33 localhost kernel: 1 lock held by bash/2182:
Nov 10 14:54:33 localhost kernel: #0: (&tty->atomic_read_lock){+.+...}, at: [<c060f4a5>] n_tty_read+0x1d2/0x5ee
Nov 10 14:54:33 localhost kernel: 1 lock held by bash/2199:
Nov 10 14:54:33 localhost kernel: #0: (&tty->atomic_read_lock){+.+...}, at: [<c060f4a5>] n_tty_read+0x1d2/0x5ee
Nov 10 14:54:33 localhost kernel: 1 lock held by mingetty/2517:
Nov 10 14:54:33 localhost kernel: #0: (&tty->atomic_read_lock){+.+...}, at: [<c060f4a5>] n_tty_read+0x1d2/0x5ee
Nov 10 14:54:33 localhost kernel: 1 lock held by mingetty/2518:
Nov 10 14:54:33 localhost kernel: #0: (&tty->atomic_read_lock){+.+...}, at: [<c060f4a5>] n_tty_read+0x1d2/0x5ee
Nov 10 14:54:33 localhost kernel: 1 lock held by mingetty/2519:
Nov 10 14:54:33 localhost kernel: #0: (&tty->atomic_read_lock){+.+...}, at: [<c060f4a5>] n_tty_read+0x1d2/0x5ee
Nov 10 14:54:33 localhost kernel: 1 lock held by mingetty/2520:
Nov 10 14:54:33 localhost kernel: #0: (&tty->atomic_read_lock){+.+...}, at: [<c060f4a5>] n_tty_read+0x1d2/0x5ee
Nov 10 14:54:33 localhost kernel: 1 lock held by mingetty/2521:
Nov 10 14:54:33 localhost kernel: #0: (&tty->atomic_read_lock){+.+...}, at: [<c060f4a5>] n_tty_read+0x1d2/0x5ee
Nov 10 14:54:33 localhost kernel: 1 lock held by mingetty/2522:
Nov 10 14:54:33 localhost kernel: #0: (&tty->atomic_read_lock){+.+...}, at: [<c060f4a5>] n_tty_read+0x1d2/0x5ee
Nov 10 14:54:33 localhost kernel: 1 lock held by bash/2679:
Nov 10 14:54:33 localhost kernel: #0: (&tty->atomic_read_lock){+.+...}, at: [<c060f4a5>] n_tty_read+0x1d2/0x5ee
Nov 10 14:54:33 localhost kernel: 3 locks held by kworker/0:3/5698:
Nov 10 14:54:33 localhost kernel: #0: (events){+.+.+.}, at: [<c0446ded>] process_one_work+0x13e/0x2bf
Nov 10 14:54:33 localhost kernel: #1: (wireless_nlevent_work){+.+.+.}, at: [<c0446ded>] process_one_work+0x13e/0x2bf
Nov 10 14:54:33 localhost kernel: #2: (rtnl_mutex){+.+.+.}, at: [<c070220f>] rtnl_lock+0xf/0x11
Nov 10 14:54:33 localhost kernel: 1 lock held by ip/6438:
Nov 10 14:54:33 localhost kernel: #0: (rtnl_mutex){+.+.+.}, at: [<c070f78c>] netlink_dump+0x3a/0x16a
Nov 10 14:54:33 localhost kernel: 1 lock held by ip/6441:
Nov 10 14:54:33 localhost kernel: #0: (rtnl_mutex){+.+.+.}, at: [<c070220f>] rtnl_lock+0xf/0x11
Nov 10 14:54:33 localhost kernel: 1 lock held by ip/6442:
Nov 10 14:54:33 localhost kernel: #0: (rtnl_mutex){+.+.+.}, at: [<c070220f>] rtnl_lock+0xf/0x11
Nov 10 14:54:33 localhost kernel: 1 lock held by iwconfig/6443:
Nov 10 14:54:33 localhost kernel: #0: (rtnl_mutex){+.+.+.}, at: [<c070220f>] rtnl_lock+0xf/0x11
Nov 10 14:54:33 localhost kernel: 1 lock held by ip/6444:
Nov 10 14:54:33 localhost kernel: #0: (rtnl_mutex){+.+.+.}, at: [<c070220f>] rtnl_lock+0xf/0x11
Nov 10 14:54:33 localhost kernel: 4 locks held by sh/6449:
Nov 10 14:54:33 localhost kernel: #0: (&(&i->lock)->rlock){-.-...}, at: [<c0631760>] serial8250_interrupt+0x1e/0xe2
Nov 10 14:54:33 localhost kernel: #1: (&port_lock_key){-.-...}, at: [<c06314e6>] serial8250_handle_port+0x10/0x26c
Nov 10 14:54:33 localhost kernel: #2: (sysrq_key_table_lock){-.....}, at: [<c061e912>] __handle_sysrq+0x18/0x11d
Nov 10 14:54:33 localhost kernel: #3: (tasklist_lock){.+.+..}, at: [<c0459d53>] debug_show_all_locks+0x43/0x179
--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc http://www.candelatech.com
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